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Garden Grove Weather by Month
Average temperatures, rainfall and humidity for Garden Grove, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical Garden Grove month looks like before you travel — then check the live Garden Grove forecast for the days ahead.
Warmest month
August
30°C average high
Coolest month
January
10°C average low
Wettest month
October
92 mm of rain
Driest month
August
2 mm of rain
Average temperature and rainfall in Garden Grove by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 20°C | 10°C | 2°C / 32°C | 54 mm | 63% | 8 km/h |
| February | 20°C | 11°C | 2°C / 34°C | 51 mm | 63% | 9 km/h |
| March | 21°C | 12°C | 5°C / 36°C | 39 mm | 67% | 9 km/h |
| April | 22°C | 13°C | 7°C / 37°C | 13 mm | 66% | 10 km/h |
| May | 23°C | 15°C | 9°C / 37°C | 16 mm | 70% | 10 km/h |
| June | 26°C | 17°C | 12°C / 44°C | 4 mm | 73% | 9 km/h |
| July | 29°C | 19°C | 15°C / 43°C | 2 mm | 71% | 9 km/h |
| August | 30°C | 19°C | 15°C / 39°C | 2 mm | 71% | 9 km/h |
| September | 29°C | 19°C | 8°C / 43°C | 6 mm | 69% | 9 km/h |
| October | 26°C | 16°C | 5°C / 39°C | 92 mm | 67% | 8 km/h |
| November | 23°C | 13°C | 4°C / 33°C | 23 mm | 60% | 8 km/h |
| December | 20°C | 10°C | 2°C / 29°C | 53 mm | 64% | 8 km/h |
Best time to visit Garden Grove
The most comfortable time to visit Garden Grove is generally May to June and November, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around October, totalling about 352 mm a year.
Travellers who prefer heat should aim for August, when highs average 30°C. October is the month to avoid if rain would spoil your plans — it averages 92 mm, roughly 48× the rainfall of the driest month (August).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Garden Grove forecast for what is happening now.